Dumping unit for motor trucks



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July 12, 1927. J c. POTH DUMPING UNIT FOR MOTOR TRUCKS Filed man 27, 1925 July l2. 1 927.

J. C. POTH 27 1925 s sheets-sheet 2 mw mw Fw QN mw ,Hllw f NV illm mw m M f il .,Il O o c n a l I|Ww mw u NN Hull QN! im /mw m H W o .Il J llllll'll NN QN @N ,QN mn N 1 27. July l2 9 J. c. Po-rH DUMPING UNIT FOR MOTOR TRUCKS 3 Sheets-Sheet 3 Filed March 27. 1925 Patentecl July l2,Y 1927.

i UNITED STATES JOHN CQPOTH, F GALION, OHIO.

DUMPING UNIT Foa Moron '.raUcKs.`

Applcatiion'led March 27, 1925.v {Serial No. 18,829f

This invention relates to i an improved .dumping 4unit for motor trucks and seeks, among other objects, tol provide a unit of this character which may be read-ily attached to ra conventional truck chassis to provide a dumping truck.'

rl`he invention seeks, as a further object, to provide a novel mounting for the body whereby the body may be tilted and dumped.

And the invention seeks, as a still further obj-ect, to provide a body mounting which will be sturdy and free from mechanical complications and which will support the body for free rocking movement.

Other and less important objects will appear as the description proceeds In the accompanying drawings:

Figure 1 is a side elevation showing my improved,dumping unit applied to a conventional truck chassis.

Figure 2 is a planfview, parts beinglbroken away and illustrated in section.

Figure 3 is a vertical sectional view showing the mounting 'of the rockers.

Figure 4 is a detail sectionalfview showing the catch for securing the body in lowered position. v

Figure 5 is a. detail sectional view on the line 5-5 ofFigure- 4, looking in thedirection indicated by the arrows.

Referring now more particularly tothe drawings, I have, for convenience, .shown my improved dumping `unit inI connection with a conventional truck chassis, the'side bars or' thev frame otwhieh are indicated at 8 and the rea-r wheels at 9, while a conventional eab is shown at"10. rn accordance with the present improvements, 1 employ base frame comprising parallel Vsiele 4bars l1 which are connected by front, reatr and interinediate cross bars 12 preferably welded to the side bars to afford rigidity. The cross bars 12 rest uponthe side bars 8 of the truck chassis and extending through the front and rear cross bars are bolts 13 which carry hooked plates 14 engaged with the side bars 8 of the chassis frame for rigidly securingy end bosses 17 between which are yprovided similar intermediate bosses 18. i each pairof the bosses 17 arestub shafts 19 upon which are journaled` rollers 20, and 'extending through the outer ends of ysaid shafts are keys 21 limiting the rollers against displacement. Extending through the'bos'ses 18 ofV the brackets is a removab'le cioss'rod 22 projecting at its endsbe-A tween the pairs oit rollers 20, and engaged through said rod to confront the inner .sides of the bosses are pins 23 limiting the rod Fixed in cel again'stlendwise displacement. Fixed at its v ends to the side bars 11 ofthe base frame near the forward extremities of said side bars is an inverted U-shap'ed, rest 24.

Supported for rocking movement by the pairs oi rollers ,20j is a body 25. Reinforcing the bottom wall of the bodyV are longitudinal side bars 26 andiA extending tra-iis-v versely between said side bars is a pair of' parallel cross ybars 27. Riveted or otherwise secured at their ends tothe extremities of said ci'ossbars is a pair of substantially semi-circularrockers 28restingon the pairs of rollers 20. These rockers are channelshaped in cross sectionV to lsnugly receive the'v rollers so* that-therollers will, at all times,

.follow the rockers while the body isfloeked against turning movement vfrom siderto side,

and it is now tobe observed' that the ends of the cross rodw22 extend over the rockers iii close relation thereto. The rod will, therefore7 coact witlrtlherockers for limiting' the rockers against displacement from the rollers and conseqiiently locking the body upoir thebase traine'.

The body 'norin'ally bears at its forward end against the rest 24" in horizontal position. Rising iroinjtlie rear veirids of the `brackets 15-are inclinedv stop members 2.9

and fixed to the end portions of the rear cross bar .27 are .stop plates 30 disposed to engage said stop members for limiting the body in its rearward tilting movement. Fixed to the forward end wall of the body is a. pair of vertically disposed angle plates 31 and `pivoted between said plates, in the manner vb est shown in Figure 5, is a depending catch 32. Straddling theplates 31 is a U-shaped plate 33 and bearing between said plate and the catch is a spring 34. Near its lower end, the catch is provided with a hook 35 to engage beneath the rest 24 for securing the body in its normal horizontal position, and curving downwardly from the hook is a cam 5 ride over the rest to be engaged therebeneath Ll t) by the spring 34. Bolted te the forward cross bar 14 of the base frame is a yoke 37 and pivoted at its lower end in said yoke is an upstanding hand lever 38. Fixed at its ends to opposite sides of said lever is a loop 39 adapted to accommodate the lower end of the cam member 36 of the latch. Accordingly, when'the level' is swung forwardly, the loop 39 will coact with said cam member l for swinging the latch forwardly and dis-- engaging the hook 35 thereof from beneath the rest 24 to thereby free the body. Secured to the forward cross bar 12 of the base frame near the ends thereof are-eye bolts 40 and connected at their lower ends to said bolts are'springs 41, the upper ends of which are secured to the forward end portions of the side bars 26 of the body. Thus, when the body is emptied, these springs will tend to return the body to its normal position.

Pivoted at the rear end of the body is a tail gate 42 provided at its ends with pins 43 and journaled at the rear of the body is a cross shaft 44 equipped at its ends with hooks 45. Connected to said hooks are springs 46 which normally hold the hooks engaged with the pins 43 for locking the tail gate closed. Depending from the shaft 44 is a lever 47 and connected at one end to said lever is a chain or other flexible element 48, which is carried forwardly beneath the cross rod 22 and is secured at its opposite end to the forward cross'bar 27 of the body. This chain is of such length that when the body is rocked rearwardly, the lever 47 will be swung forwardly by the chain so that the hooks 45 will be rocked downwardly to lrelease the tail gate. Thus, as the rearward tilting of the body continues, the tail gate will automatically gravitate to openy posi tion while, when the body is returned, the tail gate will gravitate to closed position to be again secured by said hooks.

As will now be seen in view of the foregoing, the rockers 28 will support the body 25 for free rocking movement so that when the latch 32 is released, as previously described, the body will rock rearwardly to the dotted line osition shown in Figure l, when the body w1 l be limited by the engagement .i.

be automatically secured by the latch 32. I

accordingly provide a particularly elfective construction for the purpose set forth and, as will be observed, all of the structure of the unit is carried by the base frame so that a truck may be equipped with the unit simal.'

ply by attaching the base frame to the chassis frame of the truck.

I-Iaving thus described the invention, what I claim is:

1. The combination with a supporting frame and a body mounted to tilt thereon, of pairs of rollers mounted upon the frame in spaced relation, the rollers of each pair being spaced apart and arranged in tandem, channel rockers attached to the Ybody and disposed with the channels Yfacing downwardly and receiving 'the respective pairs of rollers, and a retaining member mounted upon the frame and engaging over the rockers opposite the spaces between the rollers if:

of the several pairs to hold the rockers thereon and movable to release the rockers and body to admit of ready removal of the latter when required.

2. The combination with a supporting il frame including side bars and a body tiltably mounted thereon, of brackets projected upwardlyV from the side bars, stub shafts pro-A jected outwardly from the brackets beyond the side bars, rollers on the outer ends, of the stub shafts, channel rockers depending from the sides of the body and receiving the rollers in the channels, and a transverse rod mounted in the brackets and having its ends engaging over the rockers to hold them in place on the rollers, and removable to clear the rockers and admit-0f displacen'ient of the body when required.

In testimony whereof I aflix my signature.

JOHN C. lPOTI-I. [Ls] 

